Oliver County, North DakotaProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- December 2026; North Dakota law requires real-estate tax statements to be mailed by December 26, 2026; county-specific mailing date was not published in official sources reviewed.
- Payment deadline
- 2026 schedule for 2025 real-estate taxes: due January 1, 2026; 5% discount if paid in full by February 15, 2026; first installment and all special assessments due March 1, 2026 without penalty; second installment due October 15, 2026 without penalty; statutory penalties apply after installment dates under N.D.C.C. §57-20-01.
- Assessment appeal
- For 2026 assessments, assessment notice must be delivered at least 15 days before the local board meeting; city/township Boards of Equalization meet in April, the county Board of Equalization meets within the first 10 days of June, and the State Board of Equalization meets August 11, 2026. Exact county hearing/protest date was not published; contact the county Director of Tax Equalization.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
2026 Homestead Property Tax Credit application based on 2025 income is due April 1, 2026 to the local assessor/county director; North Dakota farm residence exemption applications are due February 1, 2026, with supporting gross-income information generally due by March 31, 2026.
Senior relief
North Dakota Homestead Property Tax Credit: homeowner age 65 or older or permanently and totally disabled, living at and owning/investing in the homestead, with preceding-calendar-year income no more than $70,000. Income $0–$40,000: taxable value reduced 100% up to $9,000 (maximum $200,000 true/full value); income $40,001–$70,000: 50% up to $4,500 (maximum $100,000 true/full value). The 2026 application is due before April 1, 2026; North Dakota also provides a disabled-veteran credit.
Valuation limits
North Dakota HB 1176, signed May 17, 2025, limits annual increases in each taxing district’s property-tax levy to 3% plus unused excess percentage capacity from the prior five years without voter approval, effective for tax year 2026; statutory adjustments and voter-approved exceptions apply. This is a levy limitation, not a general parcel valuation cap; no separate general parcel valuation cap was identified in official North Dakota sources reviewed.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.